<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
    <!-- 包含公共顶部文件 -->
    <th:block th:insert="~{../common/top.html}"></th:block>
</head>

<body>
<!-- 背景视频 -->
<video autoplay loop muted playsinline id="background-video">
    <source th:src="@{/images/main_bg.mp4}" type="video/mp4" />
</video>

<div id="BackLink">
    <a th:href="@{/mainForm}">Return to Main Menu</a>
</div>

<!-- 显示错误信息 -->
<p th:if="${signOnMsg != null}">
<center><font color="red" th:text="${signOnMsg}"></font></center>
</p>

<!-- 包含公共底部文件 -->
<th:block th:insert="~{../common/bottom.html}"></th:block>
</body>
</html>